Gaiman and Warner Bros. have been getting a lot of questions from concerned Sandman fans after DC’s massive announcement of movies. DC’s announcement as you might remember (http://www.vingle.net/posts/540399) included 13 superhero movies between now and 2020 including Justice League. Sandman fans were worried because the announcement didn’t include any info on the movie adaptation of Gaiman’s graphic novel.
To be really blunt, the answer is really simple: Sandman isn’t DC, it’s Vertigo, so fans are gonna need to wait for an announcement from Vertigo for information about the Sandman movie.
As a big Gaiman fan this is kinda like those times you ask a friend who their favorite member of the Justice League is and they say Iron Man.